Question

(7) For an given A.P. t7=4, d=-4 then a=...​

Answer 1

${☆Given:- } \\ {1) t7 = 4} \\ {2)d = -4} \\ \\ {☆ \: To \: \: Find :-} \: \: \\ \: {1) a = ?} \\ \\{☆ Solution:- } \\ { \implies \: tn = a + (n - 1) \: d} \\ { \implies4 = a + (7 - 1) \: - 4} \\ { \implies4 = a + \: (6) - 4} \\ { \implies4 = a - 24} \\ { \implies4 + 24 = a} \\ \boxed{ \implies \: \pink{a = 28}}$